can someone explain to me why would anyone with more than rm10k trade with itrade? clickstrader is just so much cheaper, proportionately too to your trade size

if i were to purchase rm 1million worth of shares, using clickstrade i'll be paying rm8.88 in brokerage, using itrade i'll be paying 1 million x 0.42% = rm4200

surely this rm4191.12 difference outweighs any benefit you might have using itrade? especially when they're both pretty much the same?